Games like Lethal Dungeon
Games like Lethal Dungeon include Balatro, Slay the Spire, Vampire Survivors, Slay the Spire 2, and The Binding of Isaac: Rebirth. We matched them by the tags players give Lethal Dungeon on Steam (Strategy, Roguelike, Card Battler, Roguelite, and 2D): closest matches first, and among equally close ones the better-known games.

Balatro
Shared: Roguelike · Strategy · Pixel Graphics

Slay the Spire
Shared: Card Battler · Roguelike · Strategy

Vampire Survivors
Shared: Roguelite · Pixel Graphics · 2D

Slay the Spire 2
Shared: Roguelike · Strategy · Card Battler

The Binding of Isaac: Rebirth
Shared: Roguelike · Pixel Graphics · Indie

Slots & Daggers
Shared: Strategy · Roguelike · Roguelite

Vampire Crawlers: The Turbo Wildcard from Vampire Survivors
Shared: Card Battler · Roguelike · Strategy

FTL: Faster Than Light
Shared: Roguelike · Strategy · Indie

Stoneshard
Shared: Roguelike · Strategy · Pixel Graphics

Skul: The Hero Slayer
Shared: Roguelike · Pixel Graphics · 2D

Dead Cells
Shared: Roguelike · 2D · Pixel Graphics

Wall World
Shared: Roguelite · Roguelike · Strategy

Inscryption
Shared: Card Battler · Roguelike · Strategy

Loop Hero
Shared: Roguelike · Roguelite · Pixel Graphics

Luck be a Landlord
Shared: Strategy · Roguelite · Roguelike

Peglin
Shared: Roguelike · Roguelite · Strategy

Nubby's Number Factory
Shared: Strategy · Roguelike · 2D

Into the Breach
Shared: Strategy · Pixel Graphics · Roguelike

Dungeons & Degenerate Gamblers
Shared: Roguelike · Strategy · Card Battler

9 Kings
Shared: Strategy · Roguelike · Roguelite

Die in the Dungeon
Shared: Strategy · Roguelike · Card Battler

Dicey Dungeons
Shared: Card Battler · Roguelike · Roguelite

Ratropolis
Shared: Card Battler · Strategy · 2D

Crying Suns
Shared: Strategy · Roguelite · Pixel Graphics